A curated list of tools, articles, books, and any other resource related to code review

Code review is the systematic examination (sometimes referred to as peer review) of computer source code.

• Academic Papers
• Articles
• Books
• Talks and Podcasts
• Tools

• An experiment to assess the cost-benefits of code inspections in large scale software development (Porter, Siy, Toman & Votta, 1997) Early paper that tested a range of then current review techniques including multi-stage review and code-review-via-meeting that found you can get most of the benefit in an offline, single pass, with two reviewers.
• Anywhere, anytime code inspections: using the Web to remove inspection bottlenecks in large-scale software development (Perpich, Perry, Porter, Votta & Wade, 1997) One day in the far future the best way to review code witll be on the world wide web.
• Design and Code Inspections to Reduce Errors in Program Development (Fagan, 2002) Using a more formal process, particulary with defined roles for each participant and drive a big increase in error detection during review.
• Helping Developers Help Themselves: Automatic Decomposition of Code Review Changes (Barnett et al. 2015) (summary on the morning paper) Research into automatically splitting big diffs into smaller diffs leading to better reviews.
• Work Practices and Challenges in Pull-Based Development (Gousios et al. 2015) (summary on the morning paper) Field study of how GitHub pull requests are used in the wild.

• Brian Guthrie's Feature Branching Rant Twitter thread on the pros and cons of GitHub's open source first model with regards to "in-company" code review practice.
• Code Reviews: Just Do It Seminal post advocating for peer review of software back in 2006.
• Designing Awesome Code Reviews Principles for actively designing a code review process.
• Effective Code Reviews Without the Pain Another 2006 classic on how to effectively perform a code review.
• How I review code More personal advice on how to best review a pull request from an engineer at Tumblr.
• Pull Requests: How to Get and Give Good Feedback Advice for both sides of the code review process, the reviewer and the reviewee.
• Ship Small Diffs Why it's better to review small changes rather than large ones.
• The Art of Humanizing Pull Requests Emoji rich guide to the human side of code review via pull requests.
• Towards Productive Technical Discussions Tactical questions and actions to push code review discussions into more productive territory.
• Unlearning Toxic Behaviors in a Code Review Culture A how-to guide for pull requests via how-not-too.
• Why I changed the way I think about Code Quality Why code quality is about more than just the code.

• Best Kept Secrets of Peer Code Review Older compliation of 10 essays on the practice of code reviews. Some repetition due to different authors covering the same territory.
• Handbook of Walkthroughs, Inspections, and Technical Reviews Older book covering more formal walkthroughs but covers politics and group dynamics in review well.
• Peer Reviews in Software: A Practical Guide A practical guide to formal code inspections as a code review practice.
• Software Inspection: An Industry Best Practice Compendium of papers on code review practice.
• Ultimate Guide to Code Reviews Codacy sponsored ebook of code review practices based on developer survey.
• What to Look for in a Code Review JetBrains sponsored ebook of how to spot coding anti-patterns during review.

• Code Reviews: Honesty, Kindness, Inspiration: Pick Three - Jacob Stoebel RubyConf 2017 How to do effective code review while remaining kind to the original author.
• Goldilocks and the Three Code Reviews - Vaidehi Joshi RedDot Ruby Conf 2017 Finding just the right amount of code review by focussing on what is effecting.
• Implementing a Strong Code-Review Culture - Derek Prior Railsconf 2015 How to instill a healthy code review culture in a team.

• Crucible Atlassian's on-premise code review tool.
• Gerrit Open source git code review tool originating out of Google.
• Github Git hosting and pioneer of the "Pull Request".
• Phabricator Open source git/mercurial/svn code review tool originating out of Facebook.
• Reviewable Code review tool built on top of Github Pull Requests.
• Review Board Open source review tool that is SCM/platform neutral.
• Upsource JetBrain's on-premise git/mercurial/perforce/svn code review tool.

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To the extent possible under law, John Barton has waived all copyright and related or neighboring rights to this work.